Q.1. Sky wave communication is based upon (A) reflection by ionosphere (B) absorption by ionosphere (C) transmission through ionosphere (D) None of these Ans :- (A) Q.2. The process opposite to modulation is (A) demodulation (B) transmission (C) remote sensing (D) fax Ans :- (A) Q.3. A net work within an institution is known as …
Physics Class 12th Chapter15 COMMUNICATION SYSTEM VVI Objective Question Read More »
Q.1. Main Gate (Baisc Gate) is (A) AND, OR (B) NAND, NOR (C) OR, NOT (D) AND, OR, NOT Ans :- (D) Q.2. Write the decimal number 25 in binary (A) (1100)₂ (B) (1001)₂ (C) (11001)₂ (D) (11101)₂ Ans :- (C) Q.3. How many transistor are used for NOT – gate ? (A) 1 (B) …
Physics class12th Chapter14 ELECTRONIC DEVICES VVI Objective Question Read More »
Q.1. The atomic number and mass for a specimen are Z and A respectively. The number of in the atom will be (A) A (B) Z (C) A+Z (D) A-Z Ans :- (D) Q.2. The quantities, which remain conserved in a nuclear reaction (A) Total charge (B) Angular momentum (C) Linear momentum (D) All the …
Physics Class12th Chapter13 NUCLEUS Most VVI Objective Question Read More »
Q.1. Which series comes in visible region of hydrogen spectrum ? (A) Lyman series (B) Blamer series (C) Paschem series (D) Brackett series Ans :- (B) Q.2. The minimum angular momentum of electron in Hydrogen atom will be (A) h/π Js (B) nh/2π Js (C) hπ Js (D) 2πh Js Ans :- (B) Q.3. The …
Physics Class12th Chapter12 ATOMS VVI Objective Question Read More »
Q.1. Electron volt (eV) is the measure of (A) charge (B) potential difference (C) current (D) energy Ans :- (D) Q.2. Dimension of plank constant is (A) ML²T⁻¹ (B) ML²T⁻² (C) MLT⁻¹ (D) MLT⁻² Ans :- (A) Q.3. On the basis of photo electric effect, light is (A) Wave (B) Particle (C) Both (D) None …
Physics class12 Chapter 11 RADIATION AND DUAL NATURE OF MATTER Read More »
Q.1. The colour of a thin film is due to (A) scattering (B) interference (C) Dispersion (D) diffraction Ans :- (B) Q.2. Brewster’s law is (A) μ=sin ip (B) μ=cos ip (C) μ=tan ip (D) μ=tan² ip Ans :- (C) Q.3. With increase in wavelength the refractive index (A) Increases (B) Decreases (C) Remains unchanged …
Physics class -12th chapter 10 WAVE OPTICS MOST VVI Objective Question Read More »
Q.1. SI unit of power of a lens i (A) joule (B) diopter (C) candela (D) watt Ans :- (B) Q.2. The radius of curvature of plane mirror is (A) infinite (B) zero (C) + 5cm (D) – 5 cm Ans :- (A) Q.3. A bi-convex lens can form a virtual image if the object …
Physics class 12th chapter 9 RAY OPTICS Most VVI Objective Question Read More »
Q.1. Which of the following is of electromagnetic wave character (A) B – rays (B) a – rays (C) y – rays (D) none of these Ans :- (C) Q.2. Which one of the following has maximum penetrating power (A) X – rays (B) cathode rays (C) a – rays (D) y – rays Ans …
Physics class -12th Chapter-8 ELECTROMAGNETIC WAVES Most VVI Objective Question Read More »
Q.1. The unit of reactance is (A) Ohm (B) Farad (C) Ampere (D) Mho Ans :- (A) Q.2. Impedance of L-R circuit is (A) R+ωL (B) R²+ω²L² (C) √R+ωL (D) √R²+ω²L² Ans:- (D) Q.3. If φ is the phase difference between a.c. current and e.m.f then the value of power factor is (A) tan φ …
Physics Class 12th Chapter 7 Alternating Current Most VVI Objective Questions Read More »
Q.1. Which series comes in visible region of hydrogen spectrum ? (A) Lyman series (B) Blamer series (C) Paschen series (D) Brackett series Ans:- (B) Q.2. The minimum angular momentum of electron in hydrogen atom will be (A) h/π Js (B) nh/2π Js (C) hπ Js (D) 2πh Js Ans:- (B) Q.3. The number of …
Physics Class-12 Chapter-12 Atoms Most VVI Objective Questions Read More »
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